Spreading-oven for the manufacture of sheet-glass.



r. HELLER. BPBBADXNG OVEN FOR THE MANUFACTURE OF SHEET GLASS.

APPLIOATIOI FILED P3314; 1814. I

1,120,486. Patented Dec. 8,1914.

my 1 1g:

k F0 SPBBADIIG OVEN FOR THE MANUFACTURE OF SHEET GLASS.

APPLICATION PILED PEEL, 1914.

5 SHEETSSHEET 2.

Patented Dec. 8, 1914.

P. HELLER. SPBBADING OVEN FOR. THE MANUFACTURE OF SHEET (ii-88.,APPLIOATIOI FILED FEB.24, 1914.

' Patented Dec. 8, 1914 5 BEBETBBBBET 3.

P. HELLER. srnnmme OVEN r012 THE mfiumcmar: or ammcuss,

1 1 7 APPLICATION FILED PM}. i4, 191 j P. HELLER." ,SPBEADING'OVEN ronTHE umumowan 01 magma;

APPLICATION nun) 1123.24, 1014.

rnn'z HELLER, or KASNIAU', mum rlLsnu, AUSTRIA-HUNGARY.

SPREADIN G- OVEN FOR THE MANUFACTURE OF SHEET-GLASS.

Spegification of Letters Patent.

Patented Dec. 8 1914..

Application filed February 24, 1914. Serial No. 820,631;

To all whom it may concern:

Be it known that I, Fnrrz Hnnnnn, subject of the Emperor ofAustria-Hungary,

residing at Kasniau, near Pilsen, Bohemia, Austria-l'lungary, haveinvented certain new and. useful Improvements in or Relating to'Spreading-Ovens for the Manufactfire of Sl188t G'l2LSS; and I do herebydeclare the .following to be a full, clear, and exact description of theinvention, such as will.

enable others skilled in the art to which it appertains to make and'usethe same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form'a part ofthis specification.

In the well known spreading oven for the manufacture of sheet glass, thespreadin trucksv and the traverser must be introduce in given se uenceinto the various compartments of t e oven. The driving of the trucks andof thetraverser is effected either by hand or by means of a motor. Inthe latter case, it is necessary, for the purpose of obtaining themovement desired at the time, to switch the driving motor several timesor to operate changeover devices in the power transmission gear.Thesheets of glass trimmed in the trimming compartment of the spreadingoven,arre pushed into the cooling canal or.tunnel adjoining ;the saidcompartment, in which they are intermittently, conveyed to the end ofthe cooling tunnel by a movable grid-conveyor. The movements requiredfor conveying the sheets of glass were hitherto given to the grid byhand. The cooled sheets reaching the end of the tunnel, were lifted oiiby hand fIOIl'l the grid and conveyed on a truck, the socalled sheettruck. Operation of the switches of the driving motor and of thechange-over devices of the driving gear, operation of thegr.*id-,':(m'veyei by hand, removing the cooled sheets of glass from thegrid and. laying the some on the truck, re.-

uirc ccmsidera-hle time and trouble. The

attenersinust constantly stop their fiattening work proper, so that thespreading oven the motor switches and of the changeover devices of thedriving gear, and for automatic operation of the grid-'conveyel, as

well as with a device for automatically lifting oil and laying on thecooled sheets of t glass. The grid-conveyer'is in this case driven bythe traverser reciprocating in the changing compartment, and the liftingoff and laying-on device provided at the end of the cooling tunnel, isalso operated from theitraverser through the inter-media. thegrid-conveyer. Any movement 0 the trucks and of the traverser istransmitted, by means of a suitable gear, to a switch gear for thedriving motor and for the el cally operated change-over devices of thedriving gear, so that, as soon as the movement of the spreading trucksor,of the traverser is completed, the motor is stopped, and the switchgear itself, as well as the changeover devicesof the driving gear arebrought into a posit on ready for the next movement of the trucks or ofthe traverser, so that, by a simple rotation of the switch gear, alwaystaking place in the same direction, the said gear can be brought fromthe preparatory position into the position producing the next movementof the trucks or of the tanerser, of the grid-conveyer and of the ofi'and laying-on device.

' The accompanying drawings show by way of example, a constructionaccording to this matically the consecutive movements of the spreadingtrucks and of the traverser.

Flg'. 5 shows the driving gear for the spreading trucks and thetraverser. Fig. 6"

shows the head of the spreading oven. in plan, Figs. 7 and 8 show,respectively in section and in plan, the switch gear controlling thedriving motor and the change-over devices of the driving gear. Figs.9-to 12 show details of the spreading oven,

Figs.

and 13 show in plan the whole s reading oven, with some pa omitted, anmore particularlythe driving gear for the gridconveyer. Fig. 14 shows inside elevation 'the end part of the conveyer, as Well as the liftin offand laying-on device for the Mcoolec sheets of glass. Fig. 15 showsanother detail of the spreading oven. j

The traverser 1 is reciprocated in the direction of the arrows II andIV,(Figs. 2, 4., 6 and 13) .in the changing compartment 2 of the oven,and is provided with two tracks 5, 6 on the same level as'the tracks 7or 8 arranged in the flattening compartment 3 andlin the trimmingcompartment out of gear, and during the movements II and IV, the driveof the trucks A, B, C. Moreover, during the movements I and III, aswell'as during the movements II and IV, the driving must take placealternately in opposite directions. When the whole driv ing is to beefiected by a single motor, it is therefore necessary to changealternately the direction of rotation .of the motor, as-

well as to transmitthe movement alternately to the trucks and to thetraverser, that is to say, repeatedly to switch over and to change overthe driving gear.

Devices shown in Figs. 5to 14 are intended to simplify the attendance ofthe spreading ove I For dr1ving all the movable parts of the s readingoven, is used an electric motor 9 ig. 5 the spindle 'of whi h isprovided with a'wbrmthread engaging witha worm wheel On the spindle 11of the said worm wheel is "mounteda toothed wheel 12 engaging witha'toothed wheel 13 mounted loose on the joint of two spindles 14', 15and carw ing1 at both sides electrically operated c utc e516, '17, bymeans of which the spindles 14, 15 can be driven inde endcntly of eachother. The spindle 14 drives, by means of bevel wheels 18, 19, avertical spindle (Figs. 5' and 6) driving the trucks A, B, C by mea'nsof. a chain wheel 21 and a chain 22 (Fig. '6) The s indle 15 drives thetraverser 1 by means 0 a' chain 'wheel 23 (Fig. 5-) and an endlesschain. 24 passing over rollers (not shown in the drawin o the ends ofthe chain 22 for driving the trucks, guided by rollers 25, 26 (Fig. 6)

are secured drivers or cams 27,- 28 adjustable'in guides 29 (Figs. '10and 11) provided in-the lateral walls of the flattening compartment 3and of the trimming con1- partment4. The drivers 27, are used "Forpulling the trucks in the direction of the arrows I and III. The twotrucks (A, B or B, C in Figs. 1-3) to be moved in these directions", aresimultaneously pulled, being coupled together for the impose. 'lhccoupling and uncoupling 0 two trucks is ef- ,fected automatically duringthe movement of the traverser .1 in the direction of the arrows II andIV. One end of each t! ck is provided for the purpose with a conplm headso (Fig. 12 and the other end with 'a horizontal coupling bar 31 open atboth ends; when the traverser 1 with the trucks standing on the same, ismoved, the coupling.

head of the truck situated'in the spreading or flattening compartment 3or 1n the trimming compartment 1, is brought into, or out of, engagementwith the said coupling bar. Each truck is moreover provided .at each cndwith a coupling bar32 (Fig. 12)- open at the top, with which the drivers27,

28engage from the top. -When the spreading trucks A, B are moved in thedirection of the arrow I (Fi 1), the driver 28 engages with the coup ingbar 32 of the truck B, and the driver 27 with the coupling bar of thetruck A. If the chain 22 is moved in the direction of the arrow I, the.driver 28 I pulls forward the two trucks A, B, the truck A. pullingwith it the driver 27. Durin the movement of the traverser 1, now ta ingplace in the direction of the arrow II, the driver 27 is disengaged fromthe coupling bar 32 of the truck A, and en-j gages with the bar of thetruck C, so that,

at the next movement of the trucks B," C in the directionof the arrowIII, the driver 27 becomesv operative and pulls back the said trucks B,O! The direction of rotation of the motor 9 (F 1g."5) must be changedafter each of the movements IIV. During the movements I and III, theclutch16 must be in gear, and the clutch 17 out of gear. During themovements II and IV, the clutch 17 must be in gear, and the clutch 16out. of gear.

The. switching of the motor 9 and the I changing of the clutches 16, 17required for each movement, are obtained, according to thls invention,by means of a single-switch gear S .(Fig. 6) controlled by the trucks A,B, C and the traverser 1, or by their driving parts, and arranged nearthe stand of the flattener. The switch gear S is shownon an enlargedscale in Figs. 7 and 8 and consists of a casing 33 in which is rotatablymounted a hollow spindle 34. To the upper end of the hollow spindle 34is secured a switch disk 37 carrying two concentric contact rings 35, 36(Fig. 7). Each of the two contact rings 35, 36 consists of four metalsections a, a e a orb", b" (Fig, 8), separated from each otherlivinsulat ng sections a. 'In the hollow spindle 34 is mounted a spindle34 to which is secured a crank or handle 38 (Fig. 7) carrying twoslidingbrushes d, f, the brush d being intended for the outer, and thebrush -f for the inner contact rings 35, 36. To

the contacts a a and to the contact brush (.4 are connected the currentsupply wires for the motor 9 which, when the brush (1' is on thecontacts a 'and a", rotates in one direction, and when the brush d is onthe l contacts a and W, in the opposite direction. To the two contactsb". are connected conductor wires leading to the clutch 16, and

to the contacts 6", conductors leadin to the clutch 17. When the handle38 0 the switch gear: S is in the position 38 illustrated in Fig. 8, themotor 9 rotates in the direction corresponding to the direction ofmovement I of the trucks (Fig. 1); on the contrary, when the handle isin the position 38, the motor rotates in the direction corresponding tothe direction III, that is to i say, in the opposite direction. In bothcases,

the clutch 16 is in gear, and the clutch 17 out of car. If the handle isin the position 38 and 38; the clutch 17 is in gear, and the clutch 16out of gear, so that only the .traverser 1 is driven, namely, as withthe handle in the position 38", the motor 9 rotates in the directionopposite to that when the handle is in the position 38, once in thedirection of the arrow 11, and then in the direction of the arrow -IV(Figs. 2 and 4). When the handle 38 is above' the insulating sectors 0(Fig. 8), both clutches 16, 17 are out of gear, and the motor 9 isstanding still. For throwing the-clutches out of gear after the currenthas been cut oil, are used springs 39 (Fig. 5). By means .of the switchgear described, all themovements I-IV can therefore be obtained in theproper sequence by simply rning the handle 38 in the direction of 'earrow in,

he motor 9 must be stopped at the moment when the. trucks or thetraverser reach their end positions. The stopping of the motor at theproper moinent can be effected automatically, by the movements of thetrucks and of the traverser 1 being transmitted to the hollow (spindle34 supporting the contacts a"ayand b", b", so that, after eachcompletedmovement I-IV, the said contacts are pulled off from the stationarysliding brushes d, f, and the latter are on the insulating sections 0.

The driving chain 22 for the trucks engage with two toothed wheels 40,41 (Fi 6) arranged at opposite sides of the chain 22 and consequentlyrotated in, opposite directions. The movement of the toothed wheels 40,41 is transmitted by means .of chain wheels 42, 43 and chains 44, 45(Fig. 6), to chain wheels 46, 47 loosely mounted on the hollow spindle34 of the switch gear S (Fig. 7) and carrying each one pawl 49 or 50.The pawls 49, 50- engage respectivel with ratchet wheels 51, 52 securedto moment when the trucks moving in the direction of the arrow I, reachtheir end porive at the insulating fields 0, whereby the motor 9 isstopped, and the clutch 16 thrown out of gear. In the same way, duringthe movement III, the contacts a and b" are pulled away from the slidingbrushes d, f.

The traverser 1 is provided at each side with a short tooth rack 53 or54. These tooth racks 53, "54 are arranged at the end of the traverser(Fig. 6), and toward the end of the movements II and IV of the traverser1, come into engagement with a toothed wheel 55 or 56 The toothed wheels55, 56 are arranged at both sides of the changing compartment 2 andshifted relatively to each other, in the direction of movement of thetraverser 1, to the amount of the movement of the latter (Fig. 6). Therotation of the toothed wheels 55., 56 is transmitted by means of chainwheels 56, 57 and chains 59, 60, to chain wheels 61, 62 mounted loose onthe hollow spindle 34' of the switch gear S (Fig. 7) and carrying each apawl 63 or 64. The pawls 63, 64 engage respectively the ratchet wheel66, and the handle 38 with the contact brushes d, 7, remains standingstill. Conseguently the contacts a", b" are disengaged mm the contactbrushes d f,

and the latter bro ght to the next insulating fields c, where y themotor 9 is stopped, and the clutch 17 thrown out of gear. In the sameway, toward the end of the movement IV of the traverser 1,-the contactsa, I)" are disengaged from the brushes (1, f, by

means of the tooth rack 5% and, of the gear 1 -parts 58, 60,62, 64, 66,34'. Each following movement can be brought about by simply rotating thehandle 38 to the next contacts.

In order to insure thatat each movement of the traverser 1, the rotationof only one of the toothed wheels 55, 56 is transmittedto the switchgear. S, the Wheels 55,.56, as shown in Fig. 9, can be loosely mounteldeach on a short spindle '67, and drive, by means of a pawl 68, a ratchetwheel 69 slecured to the spindle 67. The rotation of the spindle 67 istransmitted by means of a chain wheel 70 (Fig. 9) and chain 59 or 60, tothe hollow spindle 34 of the switch gear S. The chain wheels 61, 62 canin that case be secured to the hollow switch gear sp ndle 34. 5

The movement of the transverser 1, in-

stead of being transmitted in the manner just described, could also betransmitted from the driving chain 24 for the traverser f 1, asdescribed in the transmission of movement of the trucks. Moreover, inplace of the tooth racks 53, 54 and toothed wheels 55, 56, could be useddrivers or cams of any desired shape.

An automatic stopping of the driving motor 9, as well as an automaticoperation of the clutches 16, 17, and consequently a considerablesimplification of the attendance of the spreading oven, are thereforeobtained by means of the devices described. A further simplification ofthe attendance is insured accordin to this-invention by thegrid-conveyer an the lifting ofi and layingon device for the cooledsheets ofglass being automatically operated from the traverser 1. Thedevices used for the purpose are shown in Figs. 13 to 15. The trav'erser1 is reciprocated, as described, in the direction of the arrows II andIV in the changingcompartment 2 of the spreading oven. The movement inthe direction of the arrow II takes place whenever a sheet of glass hasbeen flattened in the spreading compartment 3, and the truck carryingthe-said sheet is to be brought into the changing compartment-2, andanempty truck from the changing compartment 2 3 into the spreadingcompartment 3. The movement of the traverser 1 in the direction of thearrow IV takes place when a sheet of glass has been trimmed in thetrimming compartment 4, and introduced into the cooling tunnel 75 (Fig.13), and the empty truck is to be brought from the trimming compartment4 into the changing compartment 2 from which the truck carrying gshectof glass that has been subjected to tening, is to be brought into thetrimming compartment 4. The trimmed sheet of glass.

is brought from the trimming compartment 4 on the bottom of the coolingtunnel '75 in which are'arranged longitudinal bars 76 connected bycross-bars 77 to form a grate or grid (Fig. 13). Th e'bars 76, 77 of thegrid can e age with corresponding grooves in the bottom of the coolingtunnel, so that their upper faces are below the bottom of the coolingtu11ncl 7 5. The trimmed sheet otglass is at first situated on thatportion of the cooling tunnel which adjolns the trimming compartment 4.In order to clear 'thi' portion of the coolingtunnel for thenest-trimmed glass sheet, the grid 76, 77'is raised, so that it raisesthe glass sheet, then pushed with its glass sheet away from the trimmingcompartment 4 and then lowered, whereupon the gridagain deposits theglass sheet on the bottom of the cooling tunnel and then returns towardthe trimming compartment 4. In that way, theglass sheets eliminary flatare intermittently conveyed to the end of {the cooling tunnel 75. Thedescribed movements of the grid 76, 77 are derived, ac-f ment of thetraverser 1. On the side of the cording to this invention, 'from themove traverser-l is arranged a short tooth rack 78 (Fig. 13) which, whenthe traverser, l is moved, engages consecutively with two toothed wheels79, 80 mounted loose on the spindles 81, 82 arranged below the longitudinal bars 76 transversely of the same. To each of the said spindles81, 82 is secured a ratchet Wheel 83, 84, with. the teeth of spindle 81in the. direction of the-arrow V (Fig. 15), while toward the end of themovement of the traverscr, the toothed wheel 80 isalso rotated in'thesame direction, but leaves the ratchet wheel 84 with the spindle v 82standing still. On the s indles 81, 82 are further mounted chain w eels87, 88. A

chain 89'passing over the wheels 87, 88,

transmits the movement of the spindle 81 tothe spindle 82, andconversely. The levers 90 (Fig. 14) used for raising the longitudinalbars 76, are mounted in the well known manner on horizontal spindles 91,each otwhich is provided at its endwith" a chain wheel 92 (Fig. 13). Thechain wheels 92 are connected together and to a chain wheel 93; mountedon the spindle 81, by means of chains 94. On the spindle 81'is furthermounted aweighted lever-95, the

movements of which to either side of the unstable equilibrium position,are limited by ioa two fixed stops 96, 97 (Fig. 15). Between the coolingtunnel 75 and lthetrayerser. 1,

'over'two horizontal rollers 98, 99 is passcd a cable or a chain 100provided at the portion facing the traverser 1, with two stops 101, 102,between which engages a driver 103 guided on the chain 100 and securedto the traverser 1. The other portion of the chain 100 is connected bymeans of a part 104 to' the longitudinal bars 76. When the traverser 1is movedfrom the position shown in full lines in Fig.113, in thedirection of the arrow II, the spindle 81 with the weighted lever 95wilh'beturned, in the manner in dicated, in the direction of the arrow,V (Fig. 1 and 'th'e weighted lever 95- will pass throu 11 its. positionof uristable equi librium an fall 'into the position shown bychain-dotted lines in F ig; 15, in which it rests 'on the stop 97. Atthe same time, the spindles 91'witb the levers9O will be turned 7 in thesame direction, whereby the grid 7e,

durin 77 will be raised. As long as the tooth rack 89 remains inengagement with the toothed wheel 79, the driver 103 will move from thestop 102 to the stop 101 without afl'ecting the chain 100. At the momentwhen the tooth rack 78 releases the toothed wheel .79. the driver 103has reached the stop 101, and continued movement of the traverser 1, wildrive the chain 100 which,'by means of the above mentioned connection104, will move the raised grid 76, 77 away from the trimmin compartment4 (arrow IV). The

weighte lever 95 which is in the chaindotted osition (Fig. keeps thegrid 76, 77 in e raised position during its movemerit. Toward the endsof the movement of the traverser 1, its tooth rack 78 engages with thetoothed wheel 80 and rotates the latter in the same direction as it didpreviously the wheel 79. This rotation of the wheel 80 is however nottransmitted to the ratchet wheel 84 and to the spindle 82, as duringthis rotation of the toothed wheel 80, the

- pawl 86 slidegover the teeth of the ratchet wheel 84. When thetraverser 1 is pushed back from the chain-dotted position in thedirection of the arrow IV, the tooth rack 78 will rotatethe toothedwheel 80 in the di' rection of the arrow VI (Fig. 15), which rotation istransmitted by the pawl 86 to the ratchet wheel 84 and the spindle 82,by the chain 89 to the spindle 81 and the weighted.

lever 95, as well as by the chains 94 to the indles 91 and the levers90. In that way, t 0 weighted lever 95 is brought back to the positionshown in full lines in Fig. 15, and the id 76, 77 is lowered and drawnin the said owered position by the driver-103, by means of the stop 102and the chain 100, toward the trimming compartment 4 (arrow II). a

For lifting out the glass sheets from the cool' tunnel; when they reachthe end of the atter, and for laying the glass sheets on the truck,there is provided, according to this invention, at the endof the tunnel,a device which is automatically operated by the traverser by means ofthe longitudinal bars 76. One of the outer longitudinal bars 76 isrovided at the end with a tooth rack 105 with teeth at the top and atthe. bottom, used for operating, the lifting ofi device. The latterconsists of grate-shaped bars 106 secured to a spindle 107 and enga ingbetween tlie longitudinal bars 76. T e spindle 107 carries a toothedwheel 108-with which engages a toothed wheel 109 mounted on a shortspindle 110 arranged above the grate -76, 77', and engaging with atoothed wheel 111 mounted on a spindle 112 (Fig. 14) arranged below thegrate. On the s indle v110 is mounted a small toothed w eel 113, and onthe spindle 112 a toothed wheel 114 of the same size. When the grid 76,77 is raised,the tooth rack105 engages with of sheet .glass, comprisinga the toothed wheel 113, and when the grid is lowered, the tooth rack105 engages with the toothed wheel 114. As soon as the raised grid 76,77 is moved away from the trimming compartment 4 (arrow IV), therotation takes place in the direction of the arrow VII (Fig. 14), owingto the upper teeth of the rack 105 and to the toothed wheels 113 and109, toothed wheel 109 and bars 106. The bars 106 lift off the glasssheet lying on the ends of the grid 76, 77 and place it on the truck1155 which is /next to the lifting off device. Owing to the movement ofthe lowered grid toward the trim- 'ming compartment, the lower teeth ofthe rack 105 and the toothed wheels 114, 111, 109 and 108 turn the bars106 back to the position shown in full lines. It will be understood thatthe glass plate, which is to be lifted from the grid, has been moved tothe rear or discharge end of the coolin tunnel, as above described.When-the gri is raised-this sheet of glass will rest on the rear end ofthe grid and when the latter is moved, in the direction of arrow IVafter being raised, the rear end of the grid with the glass sheetthereon is carried over the grate 106 before the rack 105 engages withthe toothed wheel 113.

The described devicesfor automatic op-' eration of the grate conveyerand of the.

trucks movable therein in opposite directions, a traverser to move thetrucks transversely, mechanism for imparting said movements to thetrucks, mechanism to move the traverser, and mechanisms operated by themovements of the trucks and traverser to automatically stop said movingmechanisms. v

3: A spreading oven for the manufacture lurality of compartments, aplurality oi trucks in the oven, mechanism for moving said trucks'insequence into said compartments, a cooling tunnel communicating with theoven,.and means in the tunneloperated spreading bg said truck movingmechanism to convey t e sheets of glass along said'tunnel. L-Inaspreading oven -for-the-manufacture of sheet glass, comprising japlurality of compartments; a .plurality' -ot spreadi g trucks in theoven, mechanism for moving said trucks in sequence into said compart-.

ments, said means including a traversc'r, a

cooling tunnel communicating with the .'oven, and means in the tunneloperated by the movements of the traverser to convey the sheetsof glassalong said tunnel.

5. In a' spreading oven for the manufacture of sheet glass, comprising aplurality of compartments, a plurality of spreading trucks in the oven,mechanism for moving said trucks in sequence into said compartsheets 0the gear, an electric switch for operating the clutches, and meansoperated by the s in-the oven, mechanism for moving said trucks insequence into said compartments, said means including a traverser, a

cooling tunnel communicating with, the oven, a grid-in'the tunnel forconveying the sheet of glass along the latter, mechanism operatedv bythe movement of the traverser for actuating the grid, and means operatedby the rid for. automatically lifting the 5 glass from the latter.

'7. A spreading ovenfor the manufacture of sheet glass, .comprisingaplurality of compartments, spreading trucks in the oven,

mechanismincluding a motor for moving said trucks in sequence into saidcompartments, a switchgear controlling the motor, and mechanism operatedby the movement of the trucks to automatically stop the motor.

8. A spreading oven for the manufacture of sheet glam, comprising aplurality ofcompartments, spreading trucks movable in sequence into saidcompartments, an electric motor, driving gear connecting the motor withthe trucks, electric clutches'included in movements of the trucks foractuating the switch to automatieallv stop the motor and disconnect theclutches.

9. A spreading oven for the manufacture of sheet glass, comprising aplurality of compartments, spreading trucks in the oven,

driving gear for moving the trucks opposite directions, a traverser formoving the trucks transversely in opposite directions, driving gear formoving the traverser, an electric motor 'for operating said drivinggear, clutches connecting the motor with the driving gear, a switch gearfor controlling the o eration of the motor, and means operate by themovements of the trucks and.

,traverser .for automatically operating the switch to stop the motor anddisconnect the clutches.

10. In a spreading oven for the manufacture of sheet glass, a traversermovable therein in opposite directions, trucks movable with andtransversely to the traverser, independently operable gearing for movingthe traverser and trucks, an electric motor, clutches connecting thegearing to the m0- tor, a switch gear electrically connected withthemotor and provided "with contacts correspondin to the number ofdifi'erent movements 0 the traverse'r and trucks, and arranged to impartsuccessively a movement to the trucks in .one direction and a transversemovement to the-traverser, movable contacts cooperating with theaforesaid contacts, and means operated at the end of the movements ofthe trucks and traverser for automaticallybreaking the contacts to stopthe motor.

11. In a spreading oven for the manufacture of sheet glass, a traversermovable therein in opposite directions, trucks m'ov able with andtransversely to the traverser,

independently operable gearing for moving the traverser and trucks, anelectric motor, clutches connecting the gearing to the' motor, a switchgear electrically connected with. the motor and provided with contactscorrespending to thenumber ofidilferent movements of the tra-verser andtruclvs, and arranged toimpart successively a movement to the trucks inone direction and a transverse movement to the traverser, movablecontacts cooperating with the aforesaid contacts, and means operated bythe movements of the tl' 'lClifi and traverser to move the-contacts ofthe switch gear out of contact with the cooperating contacts 12. la aspreading ov'cnfor themanufactare of sheet glass. a traverser movabletherein in opposite directions, trucksmovw ble with and transvta'sely tothe traverser, indepeiulcntly operable gearing for moving the traverserand trucks, an'electric motor, ('llltcllcs connecting the gearing to themotor, a switch gear electrically connected 'with the motor and providedvvith contacts corre' s mnding to the numberof diflerent move ments ofthe traverser, and trucks and arranged to impart successively a movementto the trucks in one direction and a transverse nmvcment to thetraverser, movable contacts co perating with-the aforesaid contacts, andmeans operated by-the movements of the trucks and traverser to rotatethe switch gear to move its contacts out of engagement of: thecooperating contacts.

13. A spreading oven for the manufacture of sheet glass, comprising aplurality of compartments, spreading trucks movable in sequence intosaid compartments, driving gear for moving said trncks, a,tmysrsor;f0r

shifting the latter, driving gear for moving the traverser, an electricmotor, clutches connecting the motor to the driving gear of the trucksand traverser, a switch gear electrically connected with the motor,having contacts for effecting the reversing of the motor andcontactsfor-effecting the operation of the clutches.

14. The combination. with a spreading oven for the manufacture of sheetglass, a reciprocating traverser therein, and a cooling tunnel connectedwith the oven, of a grid in the tunnel, means operated by the movementsof the traverser to raise and lower the grid, and means operated by themovements of the traverser to reciprocate the grid.

15. The combination with a spreading oven for the manufacture of sheetglass, a reciprocating traverser therein, and a cooling tunnel connectedwith the oven, of a grid in the tunnel, means operated by the. movementsof the traverser to.raise and lower the grid, means operated by themovements of the traverser to reciprocate the grid, and mechanism at theend of the tunnel operated by the reciprocations of the rid for removingsheets of glass from the atter.

16. Thecombination with a spreading oven for the manufacture of sheetglass, a

. reciprocating traverser therein, and a cooling tunnel connected withthe oven, of a grid in the tunnel, a series of pivoted levers adapted toraise and lower the grid, rotatable spindles connected with the levers,and means on the spindles and traverser for alternately rotating thespindles to oscillate the levers.

17. In a spreading oven, the combination with a reciprocatingtraversermovable in the oven, a cooling tunnel connected with the latter, of agrid in the tunnel comprising a series of longitudinal bars, a pluralityof pivoted levers to support the latter, two spindles connected with thelevers, and means on the spindle operable by the traverser toalternately rotate the spindles to raise and lower the levers.

18. In a spreading oven, the combination with a reciprocating traversermovable in the oven, a cooling tunnel connected with the latter, of agrid'in the tunnel comprising a series of longitudinal bars, a pluralityof pivoted levers to support the latter, two

spindles connected Withthe levers, means on the spindles operable by thetraverser to alternately rotate the spindles to raise and lower thelever, and means operated by the movements of the traverser toreciprocate the grid.

19. In a spreading oven, the

said spindles, levers on the lifting spindles adapted to engage thebars, gears on the driving spindles, a rack on the traverser adapted toengage the gears, and pawl and ratchet mechanisms on the drivingspindles adapted to alternately rotate the latter.

20. In a spreading oven, the combination with the reciprocatingtraverser movable in the oven, a cooling tunnel connected with thelatter, of a grid in the tunnel comprising eo' o I combination with areciprocat ng traverser movable in a series of longitudinal bars, twodriving spindles and lifting spindles mounted transversely of the bars,drive chains connecting a said spindles, levers on the lifting spindlesadapted to engage the bars, gears on the driving spindles, a rack on thetraverser adapted to engage, the gears, pawl and ratchet mechanisms onthe drivingspindles adapted to alternately rotate the latter, and

a weighted lever on one of the driving spindles adapted to maintain thegrid in a raised or lowered position. i

Ql. In a spreading oven, the combination with a reciprocating traversermovable in the oven, a cooling tunnel connected with the latter, of agrid in the tunnel comprising a series of longitudinal bars, two drivingspindles and lifting spindles mounted trans versely of the bars, drivechains connecting said spindles, levers on the lifting spindles adaptedto engage the bars, gears on the driving spindles, a rack on thetraverser adapted to engage the gears, pawl and. ratchet mechanisms onthe driving spindles adapted to alternately rotate the latter, anendless chain connected with the grid, and means connectingthe chain tothe traverser adapted to reciprocate the grid when the latter has beenraised and lowered.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

FRITZ HELLER.

